| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.25 |
| Score | 0% | 65% |
The dimensions of this cube are height (h) = 4, length (l) = 9, and width (w) = 8. What is the volume?
| 288 | |
| 18 | |
| 189 | |
| 54 |
The volume of a cube is height x length x width:
v = h x l x w
v = 4 x 9 x 8
v = 288
Which of the following statements about math operations is incorrect?
you can add monomials that have the same variable and the same exponent |
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you can subtract monomials that have the same variable and the same exponent |
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all of these statements are correct |
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you can multiply monomials that have different variables and different exponents |
You can only add or subtract monomials that have the same variable and the same exponent. For example, 2a + 4a = 6a and 4a2 - a2 = 3a2 but 2a + 4b and 7a - 3b cannot be combined. However, you can multiply and divide monomials with unlike terms. For example, 2a x 6b = 12ab.
If the length of AB equals the length of BD, point B __________ this line segment.
trisects |
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midpoints |
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intersects |
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bisects |
A line segment is a portion of a line with a measurable length. The midpoint of a line segment is the point exactly halfway between the endpoints. The midpoint bisects (cuts in half) the line segment.
The dimensions of this cylinder are height (h) = 4 and radius (r) = 6. What is the volume?
| 27π | |
| 200π | |
| 9π | |
| 144π |
The volume of a cylinder is πr2h:
v = πr2h
v = π(62 x 4)
v = 144π
Simplify (2a)(3ab) + (6a2)(6b).
| 42a2b | |
| 30ab2 | |
| -30a2b | |
| 42ab2 |
To multiply monomials, multiply the coefficients (the numbers that come before the variables) of each term, add the exponents of like variables, and multiply the different variables together.
(2a)(3ab) + (6a2)(6b)
(2 x 3)(a x a x b) + (6 x 6)(a2 x b)
(6)(a1+1 x b) + (36)(a2b)
6a2b + 36a2b
42a2b